Compressor



Feb.- I7. 1925.

15 Sheets-Sheet 1 COMPRESSOR H. W. WISHART Filed Feb.

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- Fel 17. 1925.

H. w. wasHART COMPRESSOR 15 Sheets-'Sheet 2 Filed Feb.

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H. W. WISHART Feb. 17. 1925. 1,526,449

COMPRESSOR Filed' Feb. 2, 1922 3 Sheets-Sheet 5 .fm/rf A-tty Patented Feb. 17, 19,25.

UNITED STATES PATENT OFFICE.

HAROLD W. 'WISHART, 0F CLINTON, IOWA, ASSIGNOR, BY MESNE ASSIGNMENT, T0

CLIMAX ENGINEERING- COMPANY, F CLINTON, IOWA, A CORPORATION OFDELA- WARE.

COMPRESSOR. l

l To all whom'z't may/concern? Be it' vknown that I, .HAnoLD.W.' WISHART,

a. citizen of the United States, vand a resi-y dent. of the city of Clinton, inthe countyof 5 Clinton and State of Iowa, have invented certain'ncw anduseful Improvements' ina Compressor; and Indo hereby declare that the following isfa full, clear, and exact description ofthe same, referencebeing had..

to the accompanying drawings', and to the numerals of referencemarked thereon, which form apart of this specification.

l This invention relates to an improved type l of compressor wherein a fluid or gas enter ing the compressor casing 1s permitted to fiow through a rotarymember and through a rotatable eccentric mto a space between the rotarymember and said eccentric to be compressed andy then forced out through control valve'openings in said casing into a bath of lubricant contained in .a chamberprovided in 'a housing enclosingthe compl'eSSvOl CaSlIlg. Y

.Itis an' object-ot` this invent-ion to pro- Y provide av compressor' wherein a refriger-V ating fluld or gas iscompressed between" sii'nultaneously rotatable members one of which is eccentric with res ect tothe other and yhas ,avane which sli ably engages in 40 a rocker movably mounted within the other y of said-rotatable members from. which the compressed refrigeratin'g iiuid or gas escapes through a valve. mechanism into a lubricant from which the compressed refrigeration fluid or gas is permitted to escape.

`,Another object of the invention is to provide a. compressor wherein a-housing has a bath. of lubricant therein within whichV a casin is submerged containing -relatively mova le coacting members adapted to compress a gas and then force-the same out'of4 the casingfthrough the lubricant pinto a suitable containery flor hold-ing the com'- "pressed gas.

It a further object ofthis invention to provide 'a compressing devlce wherein a compressor 1s mounted wlthin ahousin containing a-lubricant which. acts as` a sea and permlts proper lubrication of the oper-` rator.

It is 'furthermore an object of the invention to mount a compressor in .a housing containing a sealing lubricant to insure pos1t1ve lubricatlon of the compressor mechanisms when the same are operating to compress a gas which when compressed is discharged through the lubricant 1n said housing.

Itis an important object of this invention to provide a compressor of simple and effective construction adapted to first compress a medium between relatively movable members and then forcethe compressed medium fromibetween the relatively movable mem 1 bers out through a valve mechanism to per- ,mit the compressed medium to escape through a iuid contained in a housin rounding the compressor, said fluid 0' sur- Llieing permitted to mix with the medium and act as a lubricant for the operating members as well 'as a seal for preventing the leakage of the compressed gases.

Other and further important objects of more fully described. On the drawings:

vthis invention will bev apparent from the disclosures'in the specification and drawings.-

The. invention (in-a preferred form) is illustrated ,in the drawings and hereinafter.

Figure l is an end elevation of a compressor embodying the principles of this invention.

, parts in elevation.

cylinder and 'rotor'rotated through one hun-A dred and eighty degrees.

Fi ure 7 1s a fragmentary section similar .to Flgure 6,show1n'g 'another position of the operating mechanisms. vFigure 8 is a detail section taken on line Y .8--8of Figure 6.

Figure 9.is a detail section taken on line 9-9 of Figure .5. j f

' l' ing shaftvhaving integrally formed lor rig- As shown on the drawings: y VThe reference numeral l'indlcates a drividlyr-secured at one end-'thereof a'ange or plate 2 to'wh'iclll is rigidly bolted the iang'e or plate 3 of a compressor shaft 4. The

compressor shaft 4 projects through a sleeve 5 and through abearing 6 mounted within a recess 7 provided inthe rear n1ount` ing wall 8 of a compressor casing`9.A The sleeve 5 has a packingV therein adapted to he'- saturated with the lubricant to afford a seal obviating-the leakage o-f gases from the compressor casing. Formed. radially in the casing back wall 8 is an inlet passage 1T), the inner end of which communicates with the recess 7. A feed pipe 11 has one end secured in the outer end of the inlet passage and the other end connected with a source of supply of a medium to be coml pressed. Provided in the lower portion of the casing 9 is a valve outlet port or passage 12 which `.communicates with aV chamber 13 provided in afhousing 14. The housingA 14 is rigidly secured to the rear wall 8 and encloses the casing 9, as illustrated in Figure 2. The housing is',p'artially lled with a lubricant 15. Formed on the top of or other suitable means.

the housing 14 is a iiue or pipe 16 having a plurality of bailie plates 17 therein. The pipe 16 is adapted to be connected up with a storage tank, reservoir or other container adapted to receive the compressed medium from the compressor.

The inner end of the outlet passage l2 connects with a valve groove 18"'for1ned in the inner peripheral surface of the casing 9. Closing the open end of the casing 9 is a head or cover plate 19 having an axial sleeve 2O integrally formed centrally therein. The cover plate 19 is securely Vattached to the easing 9 by meansof screw bolts 21 As illustrated in Figure 4, the back wall 8 has a projection or boss 22 integrally formed thereon to which the feed .pipe 11 is connected. Provided in the casing back wall 8 is an auxiliary lubrithrough.

ving with the casing openings 18 and 12 acts cant feed passage 23, the upper end of which is in the boss 22 and communicates with the upper portion of the inlet passage 10. The lower end of the auxiliary passage 23 communicates with the chamber 15 of the housing 14,'as shown in Figures 2 and 4. A

needle valve 24 is mounted on the boss 22 andprojects into the auxiliary passage 23 to control the passage'of, lubricant there' Rotatably mounted within the casing 9 is a cylinder comprising a disk or circularl plate 25 which is integrally formed o-n the inner end of the compressor shaft 4. Rigidly secured to the plate 25 by screw bolts 26 orother means isa spacing ring 27 and a .disk or plate 28. The spacing' ring 27 is clamped between the plates 25 and 28, as illustrated in Figure 2. The cylinder coact'- as a valve for governing the flow of a compressed medium into the bath of lubricai'u 16. The plate 25 is provided with a circular groove 29 in the outer surface thereof. Also provided in the plate 25 near thc center thereof are a plurality of inclined Vintake passages 30. lthe outer ends ol` which communicate with the plate groove 29. The inner ends of the intake pas sages 30 open into the chamber of the cylinder. v The spacing ring 27 is pro vided with a radial o-utlet passage or opening 31, the inner end of which communicates with a cylindrical rocker opening provided transversely in the ring` 27 to the in- 1"" side ofthe outlet opening 3l. Movably mounted within the rocker opening ot' the spacing ring 27 is a cylindrical rocker 32 having a longitudinal slot o-r opening 3?, therein. An outlet opening 34 is provided in the rocker 32 and registers with the spacing ring/outlet opening 31. Part of the rocker 32 projects through the inner peripheral surface of the ring 2T. Provided in one of the walls of the rocker 32 are a plurality of outlet grooves 35 which converge ad communicate with the roclder opening 34.

The cylinder plate 28 is provided with a central opening within which is mounted a bearing 36 and a disk 3T. .integrally formed centrally -o-n the outer side of the disk 3T is a stub shaft 38 which is journalled in the ball bearing 36 and is rigidly fixed in the sleeve 20 of the casing cover 19. Integrall)7 formed at right angles on the inner side of the disk 37 is an eccentric. piu 39. 'A hearing 40 is engaged on t-he eccentric pin 39. Engaged on the bearing 4() is a pistou or rotor 41 which is centrall \7 and rotatablyv 1' mounted thereon and thereby7 ecceutricallr positioned with respcct'to the aligned shafts 4 and 38. The roto:` 41 is positioned within the spacing rinoF 27 between the plates 25 and 28. The rotor 41 is adapted to have l5 a portion of the outer periphery thereof contacting the inner periphery of the vcylinder spacing ring 27 at all times. Each side of the rotor 41 is pxovided with a circular lubricant groove 42. Integrally formed radially on the rotor 41 and projecting outwardly therefrom into the slot 33 of the rocker 32 isa vane 43. The rotor 41 isV notched at 44 to permit it to engage over the tra-ted in Figure 5.

projecting portion of the rockerz32 as illus- Av pluralit of inlet passa-ges or ports 45 are provi ed in the rotor 41 and connect the inner openings of the rotor with the notch 44 to permit a medium such as a gas to How into the crescentshaped compression chamber46 formed bctween the rotor 41 andthe cylinder. i

Theoperation 'is as follows The compressor is adapted to be operated by the driving shaft 1 which causes rotation of the' compressor shaft 4 connected there'- with. Rotation of the shaft 4 acts to rotate the compressor cylinder -27--28 which in vturn acts to rotate the rotor 41.

During the rotation of the cylinder, the rotor 41, being mounted on the eccentric pin 39. is turned with the cylinder by means of the vane 43. vAs the rotor is 0H' center it has a continuous rollingY contact of its outer pe# riphery with the linner circumference of the cylinder. During the rotation of the rotor 41, the rotor vane 43^l1as a sliding movement with respect to the'rocker 32.

A fluid or gas to be compressed is permitted to enter the compressor byway of thepipe lland theinlet passage 10 and Hows through `the bearing 6 into the cylinder groove 29.' From the groove 29, the gas passes through the passages 30 into` the space provided within the rotor 41.V Looking at Figure 5, the cylinder rotates in a clockwise direction carrying the rotor 41 with it. l The vane 43 slides inwardly towards thev center of the compressor and the point of contact between the rotor 41' and the inner peripheral surface ofthe cylinder advances with 'the movementof the cylinder.v The rotor ports are thus opened to permit the gas Within the rotor 41 to start to flow into the crescent-shaped compression cham# ber 46n being formed on the intake 4side of the rotor vane 43.` As` the cylinder rotates from the position shown in Figure 5, the cylinder outlet opening 31 moves out ofyregis- ,ter with the valve discharge opening 12, and

reaches the valve groove 18 of the casing 9i of t When this point is reached, the compressed gas in the chamber 46 starts to discharge through the valve groove 18 and Hows from the compressor through the valve outlet port or passage 12 dischar ingintothebath oflubricant l5 within the ousing 14. Discharge of the compressed gas into the housing14 thu's takes place during a portion of each turn of the cylinder and rotor, or until the cylinder opening 31 passes the valve'ontlet opening 12.

It wlll bev noted'that while the chamber 46a on the intake side of the rotor vane 43 is being filled and increases in size. gas trapped within the chamber 46 on the comression or outlet side of the rotor vane 43 1s first gradually compressed for a portion of a turn of the cylinderand is then positively discharged frnm the compressor casing during the last port-ion of the turn of the cylinder. The novel construction of the compressor causes the positive,ej'ection of' the compressed gases and thereby obviates any gases from remaining in the compression chamber 46 from lexpanding to' prevent complete filling of thel chamber 46 with a new charge during the next cycle of operation.

As the compressed gases are discharged into the housing 14, the mix with l:he lubricant. 15 and gradualy travel upwardly therethrough into the upper portion of the housing chamber 13 and escape through the discharge pipe or Hue 16.V 'In passing into the Hue 16 the compressed gases pass bev tween the baffle plates 17, thereby causing the gases to be separatedl from any particles of lubricant which might still be mixed therewith. The compresse-d gases passing outwardly through the Hue 16 are permitted vto enter a tank or other container.

To insure positive lubrication of the operating parts of the compressor, the auxiliary passage 23 is rovided in the casing wall 3. One end of t e auxiliary passage connects with the housing chamber 13 and permits derstood that any other type of control mechanism may be used.

, The lubricant entering the gas inlety passage 10'mixes with the entering gases and passes into the compressor cylinder and acts as a liquid seal to prevent leakage of gases.

I am aware that numerous details of construction may be varied through a wide ran e without departingl from the principles is invention, and therefore do not Acompressor comprising@ stationary' IWise than necessitated by the prior art.

I claim as my invention:

housing containing a lubricant, la stationary casing projectingtherein, a cylinder rot-atable in said casing, a rocker in said cylinder,

lus

an eccentric in said cylinder rotatable there- AWith and a vane on'said eccentric having a sliding engagement with sa-id rocker. j

2. A compressor com rising a stationary housing containing a lu ricant, a stationary casing projectingtherein having intake and outlet 'passages therein, afcylinder in said casing, means for rotating the same, aneccentrlc in said vcylinder having a slidingV engagementwith said cylinder and adapted to g rotate with the cylinder, said cylinder and eccentric adapted 'to receive a medium therebetween` from said intake passage, compress the medium and then discharge the same through said discharge passage.

3. Av compressor comprising a stationary casing, a cylinder in said casing, a fixed eccentric pin in said casing projecting into -the cylinder, and an eccentric member on said'pin adapted to rotate with theI cylinder and movable relatively thereto.

4. A compressor comprising a statio-narj1 casing, a cylinder -concentrically mounted to rotate therein,l a xed eccentric pin, in said casing projecting into the cylinder. an eccentric member on said pin in said cylinder contacting the cylinder at one point to form a crescent-shaped chamber, andya member integral with the eccentric member having sliding engagement with the cylinder when the cylinder and the eccentric member are rotating.

casing, a cylinder rotatable therein, a sha-ft fixed in said casing and projecting into said cylinder, 4a. disk on said shaft, a fixed pin eccentrically secured on' said disk, and a rotor supported on said eccentric pin within the cylinder.

6. A compressor comprising a stationary casing, a cylinder rotatable therein, means for rotating the cylinder, a bearing supslotted member.

7. A compressor comprising a casing, a driving shaft, a cylinder in said casing connected to be driven by said driving shaft, a slotted member supported in said cylinder, :i .rotor in said cylinder. a vane formed thereon and projecting into said slottedk 5. A compresso-r comprising astationary` member, anda fixed eccentric support for said'rotor to cause the vane to slidably move into and out of said slotted member as the rotor is rotated with said' cylinder.

' 8. A compressor comprising a casing having inlet and outlet openings therein, a bearing supported by the casing, a driving shaft projecting into the casing through said 'bearing,said casing having a groove therein connected with said outlet openlng, a cyl1n ,der 1n said casmg connected to be driven by said driving shaft, said cylinderhaving a groove, inlet passages and an outlet opening therein, a slotted member supported in the cylinder, said member -having al1-outlet opening adapted to register with the outletopening in s aid cylinder, a bearing supported by the cylinder, a stub shaft in said second bearing and supported by the casing,.`

a disk formed on said stub shaft, an eccentric pin on said disk, another bearing on said eccentric pin, a rotor Within said cyl inder supported on ysaid last-mentioned bearing, said rotor having outlet passages therein connecting the interior of the rotor with acrescent chamber formed between the rotor and said cylinder, and a vane integral with said rotor having sliding engagement withsaid slotted member.

9. A compressor comprising a housing having a lubricant therein, la stationary casing therein, a cylinder journalled in said casing, a rocker in said cylinder. a rotor eccentrically mounted in said cylinder, a fixed eccentric pin supporting the rotor, means on said rotor having sliding engagement with said rocker, and .means connected with the cylinder to cause rotation of said cylinder andsaid rotor.

10. A compressor comprising a housing containing a bath of lubricant` a stationary casing secured insaid housing having a passage therein to permit lubricant to enter the casing, a cylinder journalled in the casing, a rocker in said cylinder. a fixed eccentric projecting into the cylindena rotor journalled on said fixed .eccentric within the cylinder, means for driving the cylinder to cause simultaneous rotation of said cylinder and said rotor, and means integral with said rotor having sliding engagement with said rocker.

11. A compressor comprising a housing having a lubricant therein. a Hue formed on said housing, baile plates in said Hue, a casing in said housing having a passage therein, a cylinder journalled in said casing, means for driving the same, a rocker in said cylinder, a fixed eccentric projecting into 12. A compressor comprisinga casing having a valve outlet opening and a valve between the cylinder and rotor out ofsaid groove therein communicating with one ancnsingoutlet groove and opening.

other, of a rotatable cylinder in said casing In testimony whereof I have hereunto having an outlet opening therein, a fixed subscribed my name in the presence of two I eccentric supported by sald casing and pro' subscribing witnesses.

jecting into said cylinder, a passuged rotor in said cylinder. on said fixed eccentric, and Y HAROLD W. WISHART. means for driving-said cylinder and rotor Witnesses: whereby the cylinder acts as a valve to con- F. E; WooDs,

10 trol the iow of a compressed medium frorn J OSEPHINE SULLIVAN. 

